Not you, but your character…what is that character thankful for?
Mine is thankful for the refuge of the cities, and the fact that she doesn’t have to eat or drink anything when times get difficult financially. She is also thankful to the Horde for keeping her sharp, for without them, she would probably just be some dirty wench instead of a fighter for good.
That the nightelfs and their world tree and no up to date sprinkler systems…
My guys are very thankful for the exp boosts and AV. It took about a year’s worth of leveling and condensed it into just under two months.
The light.
Im thankful for my demons voice inside of me always helping me in tough decision making.
Cookies.
Someone brought me a box of cookies yesterday at the office as thank you. They were yummy.
That I got both Mechagon mounts and can now sit around and do very little until 8.3
I’m thankful for myself, because without me, I would be not me. And that just wouldn’t be right.
His beloved, his secretary, the Priests at Netherlight Temple. His friends overall.
Also that Quel’thalas is relatively intact, and that his people are better off than they were a decade or so ago.
He’s probably also thankful that magical tailors are a thing. Dust-proof robes are wonderful when traversing the savage lands of Orgrimmar.
when i don’t need to pop invisibility to get out of stuck in combat
The Dutchesses of Breastwick, aka my amazing cans. 
Mine is thankful that he finally saved up the tokens to get the priestess’s moonsaber mount.
The hot dryad girls in dreamgrove that keep me company.
Also the cute gnome girls.
And the cuddly panda girls.
And the waggling draenei girls.
And the fluffy worgen girls.
And the drunk dwarven girls (Including dark irons, though I wonder if the carpet matches the drapes…)
And soon to be the adorable vulpera girls =P
My character is thankful that she no longer has to do the bidding of Sylvanas and her lackey, Nathanos.
Plus, she’s getting closer on the Unshackled rep for flying because of the anniversary rep boost. Yay!
That I still bother to log in.
My beloved island thunderscale…
How I love to ride a drake that will bite orcs and steal their fish on demand 
Being alive probably. If she were anything like me, I could only imagine her just being glad to have survived the chaos that is living on Azeroth.
Being essentially immortal. If I die, I sure hope to have a Get out of Hell free card.
My character is thankful to me for dis-activating my account.
While dis-activated, she is free to do whatever she wishes. and she will be wherever Sylvanas is, guarding and serving her.
She’s thankful for being a night elf female.